. >> woodruff: as we know, it's not just the presidency that's at stake tonight. 33 u.s. senate seats, a third of the senate is up for grabs as well. 23 of those seats are currently held by democrats, 10 of them by republicans. in orr to take control of the senate, the republicans need a net gain of three or four seats, depending on who wins the presidency. here is what the associated press is project the so far this evening. in the state of delaware, that tom carper has won reelection. >> ifill: and in the state of florida, bill nelson, who actually had been running against connie mack, the son and grandson of the famous connie mack, he has also won reelection, even though connie mack had been making a late surge. >> woodruff: both of those democrats. in the state of maryland, another return this isenat ben cardin, returning for his second term. >> ifill: and in rhode island, sheldon whitehouse, a good friend of the president's, returning to the senate. >> woodruff: here we have a republican in the state of tennessee, bob corker re-elected to a second term. >> ifill: jef